Cellulose sheet



' wherehy to greatly increase its usefulness as he like, havmg a paper base coated with a rue I 1,832,918..

" UNIJTED stares ra'rsu'rf ounce.

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wms m onn-roun'rn woeaonGnrmx, Born on omcaso, rumors, onnm mum sonwaarz, or 000: scum, more mums: emu: rammin Application aid a ruaa, 1m. Sex-1111a man.

' Materials hitherto em loyed-in the'manu of the coating solution or by flowing the facture of wrapping slieets, cartons, films latter over, or brushing it on, the base sheet. and other containers or wrap era for food The coating penetrates the fibrous structure and other products have, for e most part, of the base, and when dry, the resultant prodv v 5 heretofore consisted of ordinary pasteboard, 1s a sheet that is non-porous and 1m r cardboard, paper sheets of va g thickvlous to dustgrease and mo sture, and t us nesses more or less well adapts to exclude excellently adapted to serve the purposes of dirt, but incapable of preventin the passage a sanitary wrapper "or container, especially of moisture or grease, or both,t erethroug for food products, med1c1nes,and t e like, 10 It is the object of the present invention to and low 1n cost of mater als andmanufacturea provide a cellulose material in various thlck- .I claim: r I y Y assess which may range from tissue paper to As a newarticle of manufacture, a grease thick cardboard, that shall be sotreated as d m st re proof flexible material adapted to render it both grease and moisture proof, to be used pp g sheets, cartons and a a wrapper or container for all kind f fo d characteristic 1m consisting essentially of products, so as to preserve the latter from transparent nitric-cellulose contamm gamodcontamination by moisture or grease, and, in if g %ent, from the group consisting of the case of articles containing moisture or Castor 1 n r r l hosphate, that renasa or oil to. revent themoisture grease the film 80ft all p iable wh d and i oil irom working through the wrapper or which causes the film to adhere eve 'l by container. V I enetration of the fibrous structure 0 the gIncarryin outmypresentinventiou I 5 -i. I take a sheet 0% cellulose material, and to is GENTILE- sheet I apiplya coating or coverin of mtrorm cellulose issolved a suitable so vent, such as eth l-acetate, amyl acetate, ether,-cello- 1 solve {which latter is a tradename for a coal tar derivative), etc., which yields a thick: or 1 v viscous product, which is thinned "to a freely m flowing state b the addition of a suitable, amount of alco 01. To this nitrocellulose solution is then added a nonhygroscopic material which renders the same soft and more I or less pliable, when 'dry','and also causes it g i to adhere evenly and uniformly to the {sheet base. Materials which-satisfactorily serye to '7 render the nitro-cellulose solution adhesive are castor oil and tricresol'phosphate.

e it ia-to he distinctly understood that the I 1,

aria consist of a sheet of any cellulose imateria" such as cardboard, and papers of all kinds, such as semitranslucent papers,

, 45 ment sheets, whether made of linen wood, 9"

' manila paper, parchment and semi-parchrope, bagasse, pappus grass or other cellu ose materials,

The coating solution can be ap lied to the base in any suitable way, as by pin the K f 5 base sheet in, or drawing it throng ,.a' y ice 

